Sakuraba Mio, a newcomer assigned to the Department of General Surgery at the prestigious Seirei Medical University Hospital, is neither a doctor nor a nurse but her job as a nurse aide makes her the closest person to the patients. Mio is not only a caring person but also a medical geek, so she often sticks her nose into the doctor's examination and gets into trouble with other hospital staff. Meanwhile, the skilled handsome surgeon Ryuzaki Taiga thinks that a doctor's skill is everything to make a successful surgery. Taiga's complete opposite belief from Mio makes them often clash with each other.